The device is without service, type MR5100

[abuaed]

I have a Netgear device model MR5100, the service was poor and I connected to the antenna for a certain period of time and now the device is without service and you need to call the antenna in order to find service and the device works

[plemans]

I've seen some posts like this once you connect an external antenna. 

Maybe @Blanca_O or @JohnPeng can help